WO2011113277A1

WO2011113277A1 - Resource mapping method and base station

Info

Publication number: WO2011113277A1
Application number: PCT/CN2010/077862
Authority: WO
Inventors: 宁丁; 关艳峰; 方惠英; 宁迪浩; 朱登魁; 鲁照华
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-03-17
Filing date: 2010-10-19
Publication date: 2011-09-22
Also published as: CN102196575B; CN102196575A

Abstract

A resource mapping method and a base station are provided in the present invention. The method includes the following steps: in a communication system, a plurality of base stations send super-frame headers to terminals, wherein the super-frame headers carry indication information for indicating the supported usage state of an open loop region; and the plurality of base stations perform resource mapping according to the indication information, so that aligned logical resource units exist among the plurality of base stations. With the present invention, system efficiency is improved.

Description

TECHNICAL FIELD The present invention relates to the field of communications, and in particular to a resource mapping method and a base station. BACKGROUND In a communication system based on Orthogonal Frequency Division Multiplexing (OFDM) and Orthogonal Frequency Division Multiple Address (OFDMA) technologies, for example, in long-term evolution ( Long Term Evolution (LTE), Ultra Mobile Broadband (UMB) and IEEE 802.16m wireless communication systems, wireless resources are divided into frames for management, but each OFDM A symbol contains multiple Subcarriers that are mutually orthogonal, and the terminal usually occupies part of the subcarriers, so that techniques such as Fractional Frequency Reuse (FFR) can be used to reduce interference and improve coverage. Second, due to frequent changes in the wireless channel environment In order to obtain the frequency diversity gain and the frequency selective scheduling gain, the base station divides the available physical subcarriers into physical resource units (PRUs), and then maps the physical resource units into continuous resource units (Contiguous Resource Units, referred to as For CRU) and distributed resource units (distributed Resource Unit (referred to as DRU) to improve transmission performance, where subcarriers in consecutive resource units are continuous, and subcarriers in distributed resource units are completely discontinuous or not completely continuous; Increasingly, base stations need to support multiple different bandwidths (eg, 5MHz, 10MHz or 20MHz) or multi-carrier operation to take advantage of different frequency resources and meet the needs of different operators. The resource mapping process of a wireless communication system considering OFDM or OFDMA technology will be complicated. In order to reduce the indication signaling overhead of its resource mapping and optimize the system information management and transmission method, a reasonable resource mapping is needed. In order to ensure the efficiency of the wireless communication system, the base station usually maps the physical radio resources into logical radio resources, for example, mapping physical subcarriers into logical resource units, and the base station implements scheduling of radio resources by scheduling logical resource units. Specifically, for a OFDM or OFDMA-based wireless communication system, the radio resource mapping is mainly based on the frame structure and resource structure of the wireless communication system, the frame structure describes the control structure of the radio resource in the time domain, and the resource structure describes the radio resource in the Control structure in the frequency domain. The frame structure divides the radio resources into different levels of units in the time domain, such as a superframe (frame), a frame (frame), Subframes and symbols (Symbol) implement scheduling control by setting different control channels (for example, broadcast channels, unicast and multicast channels, etc.). For example, as shown in FIG. 1, the radio resource is divided into super frames in the time domain, each super frame includes 4 frames, each frame includes 8 subframes, and the sub frame is composed of 6 basic OFDMA symbols, and the actual system is required according to needs. Factors such as the supported bandwidth and/or the cyclic prefix length of the OFDMA symbol determine how many OFDMA symbols are included in each level unit in the frame structure; in addition, the system can set the broadcast channel in the first downlink subframe in the superframe (due to Located in the superframe header, also called Superframe Header (SFH), and sends system information such as resource mapping; and the system can also set scheduling control such as unicast and/or multicast-type control channel transmission resource allocation. information. According to factors such as networking technology, interference suppression technology, and service type, the resource structure divides the available bandwidth in the frequency domain into multiple frequency partitions (Frequency Partitions, FP for short), and then shows the frequency as shown in Figure 2. The available physical subcarriers are divided into three frequency partitions, each of which is divided into a continuous logical resource unit (CLRU) and a distributed logical resource unit (DLRU), and the continuous logical resource unit is used for frequency selective scheduling, and the distributed logical resource unit is used. For frequency diversity scheduling. The resource mapping method generally needs to support 5MHz, 7MHz, 8.75MHz, 10MHz and 20MHz system bandwidth (referred to as bandwidth), while 5MHz, 7MHz, 8.75MHz, 10MHz and 20MHz bandwidth are used for partial protection subcarriers when multi-carrier operation is not considered. When mapping PRUs, the number of corresponding PRUs is 24, 48, 48, 48, and 96. Therefore, the indication parameters of resource mapping are different under different system bandwidths. For example, a system with a bandwidth of 5 MHz has 24 PRUs per subframe, and when 4 PRUs form a subband, there are up to 6 Subbands, while in a 7 MHz, 8.75 MHz, or 10 MHz system, there are 48 PRUs. There are 12 Subbands. For these two systems, Subband Allocation Count (SAC) needs to be set differently to save overhead. The downlink resource mapping process usually includes: Subband Partitioning, Miniband Permutation, Frequency Partitioning, Contigous Resource Unit/Distributed Resource Unit Allocation (Contigous Resource Unit/Distributed Resource Unit Allocation, Referred to as CRU/DRU Allocation and Subcarrier Permutation, the uplink resource mapping process includes: subband division, start band permutation, frequency partition division, continuous resource unit/distributed resource unit allocation, and tile permutation. Subband is generated by Step 4 Subband Partitioning and consists of N1 consecutive PRUs, for example, N1 = 4.

The Miniband is generated by the step Miniband Permutation and consists of N2 consecutive PRUs. For example, N2 = 1. The generated Subband and Miniband will be allocated to each frequency partition through the step of Frequency Partitioning, and then enter the fourth step of resource mapping CRU/DRU Allocation. Currently, the contiguous resource unit/distributed resource unit allocation is implemented by the following means: The SFH sends a DCASSBQ, DCAS _MB Q to the terminal, and the DCASi notifies the terminal of the downlink resource unit/distributed resource unit allocation method. The base station also sends the UCAS _SB0 , UCAS _MBQ , and UCASi to the terminal to notify the terminal of the uplink continuous resource unit/distributed resource unit. The method of allocation. When the base station performs continuous resource unit/distributed resource unit allocation on the physical resources of the terminal and the terminal to which it belongs, the replacement resource base and/or the replacement seed are required to perform continuous resource unit/distributed resource unit allocation, that is, continuous resource unit/distributed resource unit allocation. Relating to the base and/or replacement seed of the base station. A multiple input multiple output (MIMO) system is a communication system in which a plurality of antennas are respectively disposed at a transmitting end and a receiving end. It is mainly divided into two types. When there are multiple antennas at the transmitting end or the receiving end, and the data sets sent by the respective transmitting antennas are the same, the receiving end combines the signals obtained by the multiple branches, thereby improving the reliability of the link. The MIMO-like technology is called spatial diversity. In addition, when multiple antennas exist at the same time on the transmitting end and the receiving end, since the MIMO channel is equivalent to multiple parallel channels, multiple data streams can be simultaneously transmitted in parallel to improve the data transmission rate. This type of MIMO technology is called spatial multiplexing. In a MIMO communication system, a receiving end estimates a channel according to various methods (method of estimating a channel includes, but is not limited to, using dedicated pilot, intermediate pilot, and sounding, etc.), and then performs certain processing on information reflecting a channel condition. And feedback to the transmitting end, the content and processing method of the feedback is called MIMO feedback mode. An Open Loop Region (OL Region for short) refers to allocating a physical resource at a physical location of a communication system, and all base stations use a similar MIMO feedback mode for the physical resource. In an actual communication system, an open loop region is used to perform similar MIMO feedback operations for all base stations to reduce interference between cell base stations. In order to enable all base stations to uniformly allocate resources in the open-loop area, the open-loop area requires each base station to use the same physical resource, and the MIMO feedback mode of the open-loop area of each base station will be the same or similar. However, in current communication systems based on OFDM and OFDMA technologies, and/or permutation seeds, and the permutation or permutation seed of each base station is different, and therefore, the physical location of logical resource units allocated between different base stations Different, the physical resources scheduled by each base station using the same logical resource are different, so that different base stations cannot schedule the same physical resource. As an open loop area. SUMMARY OF THE INVENTION A primary object of the present invention is to provide a resource mapping method and a base station to solve at least the above problems. According to an aspect of the present invention, a resource mapping method is provided, including: a plurality of base stations in a communication system send a super frame header to a terminal, where the super frame header carries an indication indicating that a use status of the open loop area is supported Information: The plurality of base stations perform resource mapping according to the indication information, so that there are aligned logical resource units between the plurality of base stations. Further, the foregoing use states include: enabling or disabling; or, the foregoing use states include: turning on or off. Further, the base station may carry the foregoing indication information by using one of the following manners: a Cyclic Redundancy Check (CRC) by using a specific sequence and a primary superframe header by including one binary bit in the superframe header. The mask is masked by a specific sequence and the CRC of the secondary superframe header. Further, the method further includes: the base station sending a system configuration message to the terminal, where the system configuration message carries the identifier information indicating the type and/or quantity of the logical resource unit used as the open loop area. Further, the aligned logical resource units refer to logical resource units having the same physical location. Further, the indication information indicating that the use status of the open loop area is supported includes: the indication information, the base station performing resource mapping includes: the multiple base stations in the resource mapping process, when performing the allocation of the continuous resource unit/distributed resource unit, the frequency partitioning The microstrips in the whole are all distributed resource units, and all the sub-bands in the frequency partition are regarded as continuous resource units. Further, the foregoing indication information specifically indicates whether allocation of consecutive resource units/distributed resource units is performed in all frequency partitions in the resource mapping process; then, multiple base stations perform allocation of continuous resource units/distributed resource units in the resource mapping process. When all the start bands in all frequency partitions are used as distributed resource units, all the sub-bands in all frequency partitions are regarded as continuous resource units. Further, the foregoing indication information specifically indicates that the predetermined frequency partition is in the resource mapping process. Whether the allocation of the continuous resource unit/distributed resource unit is performed; when the plurality of base stations perform the allocation of the continuous resource unit/distributed resource unit in the resource mapping process, all the start bands in the predetermined frequency partition are used as the distributed resource unit, and the The sub-bands in the predetermined frequency partition are all regarded as continuous resource units. Further, the indication information indicating that the use status of the open loop area is supported includes: the indication information indicates that the plurality of base stations use the same predetermined parameter to perform allocation of the continuous resource unit/distributed resource unit; and the resource mapping by the multiple base stations includes: In the resource mapping process, the base station performs the allocation of the continuous resource unit/distributed resource unit with the same predetermined parameters when performing the allocation of the continuous resource unit/distributed resource unit. Further, the foregoing indication information specifically indicates that multiple base stations use the same predetermined parameters to allocate consecutive resource units/distributed resource units in all frequency partitions; multiple base stations use the same in all frequency partitions in the resource mapping process. The predetermined parameters are assigned to the contiguous resource unit/distributed resource unit. Further, the foregoing indication information specifically indicates that the plurality of base stations perform the allocation of the continuous resource unit/distributed resource unit by using the same predetermined parameter in the predetermined frequency partition; the multiple base stations use the same in the predetermined frequency partition in the resource mapping process. The predetermined parameters are used to allocate continuous resource units/distributed resource units. Further, the above predetermined parameters include: a replacement base and/or a replacement seed. Further, for the uplink resource mapping, the foregoing predetermined parameters include any one or combination of the following: a replacement base, a replacement seed, and a UCAS _SB . , UCAS _MB . And UCAS for downlink resource mapping, the predetermined parameters include at least one of: a replacement base, a replacement seed, DCAS _SB o, DCAS _MB0, and DCASi. Further, the base station includes indication signaling for indicating a logical resource unit used as an open loop region in a system configuration message sent to the terminal or a superframe header. According to another aspect of the present invention, a base station is provided, including: a transmitting module and a mapping module. The sending module is configured to send a superframe header to the terminal, where the superframe header carries indication information indicating that the usage status of the open loop area is supported, and the mapping module is configured to perform resource mapping according to the indication information, so that the base station There are logical resource units aligned with other base stations in the communication system. With the present invention, the base station ensures that there are aligned logical resource units between multiple base stations of the current communication system when performing resource mapping, which solves the problem that different base stations in the prior art cannot schedule the same. Physical resources act as open-loop areas, which in turn increases system efficiency. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 1 is a schematic diagram of a frame structure of a wireless communication system according to the related art; FIG. 2 is a schematic diagram of a resource structure of a wireless communication system according to the related art; FIG. 3 is a flowchart of a resource mapping method according to an embodiment of the present invention; FIG. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The abbreviations used below are as follows:

A-MAP (Advanced MAP): Advanced MAP channel

CRU (Contiguous Resource Unit): continuous resource unit

DCAS/UCAS (Downlink/Uplink CRU Allocation Size): Downlink/uplink continuous resource unit allocation size, DCASi/UCASi indicates the number of consecutive resource units per frequency partition except the first frequency partition

DCASMB/UCASMB (Downlink/Uplink miniband-based CRU Allocation Size): The downlink/uplink continuous resource unit allocation size, specifically, used to indicate the number of consecutive resource units allocated to the frequency partition in units of start bands (MB), where In the embodiment of the present invention, the indication may be performed in units of microstrips or subbands.

DCAS _SB /UCASSB (Downlink/Uplink subband-based CRU Allocation Size): The downlink/uplink continuous resource unit allocation size, specifically, the number of SB-based contiguous resource units allocated to the frequency partition, where DCAS _SB . /UCAS _SB . Indicates the parameters of the first frequency partition Number,

DSAC (DL Subband Allocation Count): The total number of downlink subband allocations;

DRU (Distributed Resource Unit): distributed resource unit;

IE (Information Element) : information element;

LRU (Logical Resource Unit): also a resource unit;

MIMO (Multiple Input Multiple Output): Multiple Input Multiple Output;

OL Region ( Open Loop Region ): open loop area;

PRU (Physical Resource Unit): physical resource unit;

SFH (Superframe Header): Superframe header, which acts as a broadcast control channel in some communication systems;

USAC (UL Subband Allocation Count): The total number of uplink subband allocations. FIG. 3 is a flowchart of a resource mapping method according to an embodiment of the present invention. As shown in FIG. 3, the resource mapping method provided by the embodiment of the present invention mainly includes the following steps (step 302 - step S304): Step S302, a communication system The plurality of base stations send a super frame header (SFH) to the terminal, where the super frame header includes indication information indicating that the use status of the open loop area is supported; and step S304, the multiple base stations perform resource mapping according to the indication information, so that There are aligned logical resource units between the plurality of base stations. With the foregoing method provided by the embodiment of the present invention, each base station in the communication system performs resource mapping, so that resource elements with the same physical location exist in the resource units used by all the base stations, and the terminal resource allocation is supported by the super frame header to support open loop. The use of the area, so that each base station in the communication system uses the same logical resource to schedule the same physical resources, so that different base stations can schedule the same physical resource as the open-loop area. In the specific implementation process, the use status of the open loop area includes: enabling or disabling, that is, the indication information indicates that the open loop area can be used; or the use status may also include: turning on or off, that is, the indication information indicates whether Use an open loop area. In a specific implementation process, the foregoing indication information may be carried in one of the following manners: by including one binary bit in a super frame header, masking with a CRC of a primary superframe header by a specific sequence, by using a specific sequence and a secondary superframe The header CRC is masked. Further, if the indication information indicates that the usage status of the open loop area is on, the method may further include: the base station sending a system configuration message to the terminal, where the system configuration carries a logical resource unit indicated to be used as an open loop area (above Identification information of the type and/or number of aligned logical resource units). Preferably, in the embodiment of the present invention, the aligned logical resource units refer to logical resource units with the same physical location. In the specific implementation process, if the foregoing indication information indicates that the use of the open-loop area is enabled or disabled, the following two manners are provided for the resource mapping in the embodiment of the present invention. In the resource mapping process of the communication system, each base station is allocated according to the replacement base and/or the conversion seed of each base station when the continuous resource unit/distributed resource unit is allocated, thereby causing each base station to use the same logical resource. The physical resources of the scheduling are different. Therefore, in the first mode of the embodiment of the present invention, each base station of the communication system does not perform continuous resource unit/distributed resource unit allocation in the process of resource mapping, but uses all Minibands in the frequency partition as all The Subbands in the DRU, 4 bar frequency partition are all used as CRUs, and the terminal is notified by the indication information. Specifically, in the manner, the foregoing indication information included in the superframe header identifies whether the open loop region is supported by indicating whether the allocation of the continuous resource unit/distributed resource unit is performed in the resource mapping process. In the process of resource mapping, each base station performs allocation of continuous resource units/distributed resource units, and all the MiniBands in the frequency partition are used as distributed resource units, and the sub-bands (SubBand) in the frequency partition are all consecutive. Resource unit. In this way, the resource units and the resource units used by the respective base stations are arranged in exactly the same position, so that resource units having the same physical location among the resource units used by the respective base stations can be simply realized. In a specific implementation process, 1-bit control signaling (OL Region Enable) may be added to the superframe header (SFH, some systems are called broadcast control channels) of the communication system to indicate whether the open loop region is supported. Since the indication information only occupies 1 bit, the signaling overhead of the system can be reduced. When each base station performs step 4 CRU/DRU Allocation in the resource mapping, if OL Region Enable = 0, the step CRU/DRU Allocation is performed according to the existing manner, and according to the replacement base and/or the replacement seed and the DCAS in the superframe header _SB . , DCAS _MB . And DCASi determine the downlink system to perform the step method, and determine the uplink system to perform the step according to the replacement base and/or the replacement seed and the UCAS _SB o, UCAS _MB o, UCASi in the superframe header. If OL Region Enable = 1 means that the 4th CRU/DRU Allocation is not performed, but the Miniband in the ^{1 1} frequency partition is all created as a DRU, the Subbands in the frequency partition are all made into CRUs, and then the next step of resource mapping is performed. In the embodiment of the present invention, when OL Region Enable = 1, it can be indicated that all frequency partitions do not perform CRU/DRU Allocation, and each base station performs frequency mapping, and all Minibands in all frequency partitions are made into DRUs, and Subbands in all frequency partitions are all made as CRUs; or, when OL Region Enable = 1, it can also indicate that certain frequency partitions (for example, the first frequency partition with equal power) do not perform CRU/DRU Allocation, which is specific. The frequency partition may be a pre-agreed frequency partition of the base station and the terminal, and therefore no additional information notification is required. In this case, each base station performs the frequency mapping, and all the Minibands in the specific frequency partition are regarded as DRUs, and Subbands in a specific frequency partition are all used as CRUs. If the CRU/DRU Allocation operation is not performed on certain frequency partitions of the system or system, the open loop region may be, but not necessarily, allocated on the system or certain frequency partitions of the system. That is, when OL Region Enable = 1, the resource unit and resource unit used by each base station are arranged in exactly the same position, and all base stations can set a certain physical resource into an open-loop Regian region. Mode 2: Each base station cannot use the same logical resource to schedule the same physical resource. The main reason is that each parameter is different. If each base station uses the same parameter when performing the allocation of the continuous resource unit/distributed resource unit, the base station sets The physical location of the resource unit is the same. Therefore, in the second mode of the embodiment, each base station uses a parameter to limit the allocation of the continuous resource unit/distributed resource unit to ensure that the resource unit having the same physical location exists in the resource unit used by each base station. In this manner, the foregoing indication information performs CRU/DRU Allocation by instructing each base station to use the same predetermined parameter, and each base station performs CRU/DRU in the resource mapping process. In Allocation, CRU/DRU Allocation is performed with the same predetermined parameters. In this way, the existing resource mapping process is less altered. In a specific application, the foregoing indication information may be implemented by placing 1-bit information ( OL Region Enable ) in a super-frame header (SFH), by which the step CRU/DRU Allocation may still be indicated, but The predetermined parameters for performing CRU/DRU Allocation for each base station are the same. Specifically, if OL Region Enable = 0, the step CRU/DRU Allocation is still performed, and the parameters used by each base station in this step are different; for example, each base station replaces the base and/or the replacement seed and the super frame header (SFH). The DCAS _SB DCAS DCASi in the downlink system performs the parameters of the step, or the base station performs the parameters of the step by using the SUCAS _SB UCAS UCASi in the replacement base and/or the replacement seed and the superframe header as the uplink system, wherein, at least The permutation base and/or permutation seed of each base station is different. If OL Region Enable = 1, it indicates that the step CRU/DRU Allocation is still performed, and the predetermined parameters used by each base station for this step are the same, for example, each base station will reserve a base and/or a replacement seed (the replacement base and/or The replacement seed is pre-agreed by the base station and the terminal, for example, may be 0) and the DCAS _SB0 DCAS _MB DCASi in the superframe header is used as a parameter of the downlink system, or each base station will reserve a replacement base and/or a replacement seed. And the UCAS _SB UCAS _MB UCASi in the superframe header is used as an uplink system for the parameters used in this step, that is, each base station uses the same permutation base and/or permutation seed for CRU/DRU Allocation. Alternatively, each base station uses a permutation base and/or replacement seed in CRU/DRU Allocation, DCAS _SBQ DCAS _MBQ and DCASi, or a replacement base and/or a replacement seed, UCAS _SB UCAS _MB . Both the base station and the terminal are pre-agreed by the base station and the UCASi, that is, the base station and/or the replacement seed, the DCAS _SB DCASMBO and the DCASi used by each base station in the CRU/DRU Allocation, or the base stations are used in the CRU/DRU Allocation. The substitution base and / or replacement seed, UCAS _SB0 UCAS _MB0 and UCAS are the same. In this way, although each base station performs CRU/DRU Allocation, it can also ensure that the resource units selected by each base station have the same physical location. Similar to mode 1, in mode 2, when OL Region Enable = 1, it can mean that the same predetermined parameters are used for CRU/DRU Allocation for all frequency partitions, and it can also indicate that a specific frequency partition (such as power equal) The first frequency partitioning) uses the same predetermined parameters for CRU/DRU Allocation, so that resource elements with the same physical location exist in the resource units set by each base station. By mode 2, when OL Region Enable = 1, some frequencies of each base station or base station The DRUs and DRUs used in the partitions are arranged in exactly the same position. Therefore, all base stations can be used as an open-loop Regian area with a physical resource of 4 bar. Preferably, in the foregoing manners 1 and 2, the system configuration message sent to the terminal or the indication signaling indicating the logical resource unit used as the open loop area may be included in the SFH, and each base station indicates the indication signaling. The logical resource unit is used as an open-loop area, and each base station performs similar MIMO feedback operation in the open-loop area, so that interference between the cell base stations can be reduced. In a specific application, the indication signaling may be used to indicate the number of logical resource units used as an open loop region, in which case the open loop region may start from the most significant position of the logical location of the logical resource unit, and then down. The logical resource units indicated by the indication signaling are arranged, and the other logical resource units are not used as the open loop area i or used. For example, when the length of the OL Region DLRU is 2 bits, when OL Region DLRU = 00, it means that no DLRU resource is used as the open loop area i or OL Region DLRU = 01, indicating that 1 DLRU resource is used as the open loop. When the area i or OL Region DLRU = 10, it indicates that 2DLRU resources are used as the open loop area i or OL Region DLRU = 11, indicating that 3DLRU resources are used as the open loop area. If a DLRU is used as the open loop area, the open loop area is started from the lowest bit of the logical position of the DLRU, and is sequentially arranged downward, and the remaining resources are not used for the open loop area. It should be noted that, in the embodiment of the present invention, the foregoing two methods may be configured only for downlink resource mapping, and not for uplink mapping resources, and vice versa. In order to further illustrate the technical solutions provided by the embodiments of the present invention, the following description is made by way of specific embodiments. In the first embodiment, the resource mapping is performed in the foregoing manner. In this embodiment, a signalling OL Region Enable is set in the SFH sent by the base station to the terminal, and the terminal resource allocation is notified whether the use of the open loop area is supported. Specifically, the OL Region Enable signaling definition is as shown in Table 1. Table 1

In this embodiment, if OL Region Enable = 1 , it means that the open loop area i or the ring open area can be supported, but the CRU/DRU Allocation of the base station in the resource mapping step is not performed, and the frequency partition is directly The Miniband is all made into a DRU, and all the Subbands in the frequency partition are made into CRUs to keep the physical positions of the DRUs taken by each base station the same. If OL Region Enable = 0, it means that the open-loop area may not be supported, and the CRU/DRU Allocation in the resource mapping step is performed according to the common procedure, that is, according to the replacement base of each base station and/or the replacement seed and the DCAS in the superframe header. _SB0 , DCAS _MB0 , DCASi determine the CRU/DRU allocation of the downlink system, and determine the CRU/DRU allocation of the uplink system according to the replacement base and/or the replacement seed and the UCAS _SB Q, UCAS _MB Q, UCASi in the superframe header. It should be noted that the embodiment may be configured only for downlink resources, not for uplink resources, and vice versa. Embodiment 2 In this embodiment, resource mapping is performed in the foregoing manner 2. In this embodiment, a signaling OL Region Enable is set in the SFH sent by the base station to the terminal, and the terminal resource allocation is notified whether the use of the open loop region is supported. Specifically, the OL Region Enable signaling is defined in Table 2. Table 2

If OL Region Enable = 0, it means that the open-loop area may not be supported, and the CRU/DRU Allocation in each base station resource mapping step is performed according to the common procedure, according to the replacement base of each base station and/or the replacement seed and the DCAS _SB in the super-frame header. o, DCAS _MB o, DCASi determines the CRU/DRU allocation of the downlink system, and determines the uplink system CRU/DRU allocation according to each base station replacement base and/or replacement seed and UCAS _SB0 , UCASMBO, UCASi in the superframe header. If OL Region Enable = 1 means that the open-loop area can be supported, but the open-loop area does not exist, the CRU/DRU Allocation in the resource mapping step is still in progress, but the bases and/or bases used by all base stations in this step are used. The permutation seed is set to the same (eg, set to 0) to keep the DRU physical location taken by each base station the same, but this step does not affect the permutation base and/or permutation seed used in other steps. It should be noted that the method used in this embodiment may be configured only for downlink resources, not for uplink resources, and vice versa. In the third embodiment, in the super-frame header SFH sub-packet sent by the base station, the mask CRC check bit of the sub-packet is used to indicate whether the open-loop area is enabled. For example, when the CRC length of the mask is 16 bits, if the function of opening the open loop area is enabled, the CRC and the special vector (1111111111111111) are XORed (or masked), and then sent, such as indicating that the open loop area i or function is not enabled. And the special vector ( 0000000000000000 ) is XORed (or masked;) and then sent. The receiving end can distinguish whether the CRC is XORed with the special vector by the content of the sub-packet, and judge whether to open the open-loop area function. The SFH sub-packet may refer to all sub-packets or a specific sub-package of the SFH terminal. For example, when the SFH has three sub-packets SP1, SP2, and SP3, the CRC check of the SP1 may be used alone to indicate whether the open loop area function is enabled. It is also possible to simultaneously detect the CRC check results of the three sub-packets. When only the check results of the three sub-packets are a certain value, it indicates whether the open-loop area function is enabled. In the fourth embodiment, the base station sends a control message to the terminal, where the control message includes parameters of the open loop area, and the parameters include but are not limited to one or a combination of the following: the type of the open loop area, the length of the open loop area, and the position of the open loop area. The control message includes any one or combination of the following: a system configuration message, a super frame header, and an A-MAP IE. A base station is also provided according to the embodiment of the present invention, and the base station can be used to implement the foregoing method provided by the embodiment of the present invention. FIG. 4 is a schematic diagram of a base station according to an embodiment of the present invention. As shown in FIG. 4, the base station includes: a sending module 40 and a mapping module 42. The sending module 40 is configured to send a super frame header to the terminal, where the super frame header includes indication information for indicating use of the open loop area, and a mapping module, configured to perform resource mapping according to the indication information, where The resource unit used by the base station and the resource unit used by other base stations in the communication system have the same physical location. Yuan. The above-mentioned base station provided by the embodiment of the present invention may enable resource units of the same physical location in the resource units used by the base stations in the communication system, so that different base stations can schedule the same physical resources as the open loop area. From the above description, it can be seen that, in the embodiment of the present invention, by modifying the existing resource mapping process, the physical resources scheduled by each base station in the communication system using the same logical resource can be the same, thereby ensuring different base stations. The same physical resource can be scheduled as an open loop area, so that the communication system can better utilize physical resources and improve system efficiency. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A resource mapping method, comprising:

A plurality of base stations in the communication system send a super frame header to the terminal, where the super frame header carries indication information indicating that the usage status of the open loop area is supported;

The plurality of base stations perform resource mapping according to the indication information such that there are aligned logical resource units between the plurality of base stations.

The method according to claim 1, wherein the use status comprises: enabling or disabling; or, the using status comprises: turning on or off.

The method according to claim 1, wherein the indication information is carried in one of the following manners: by including 1 binary bit in a superframe header, cyclic redundancy through a specific sequence and a main superframe header The check CRC is masked and masked by a specific sequence with the CRC of the secondary superframe header.

The method according to claim 1, wherein the method further includes: the base station sending a system configuration message to the terminal, where the system configuration message carries an indication that is used as an open loop area. Identification information of the type and/or quantity of the logical resource unit.

The method according to claim 1, wherein the aligned logical resource units are logical resource units having the same physical location.

The method according to claim 1, wherein the indication information indicates that the usage status of the open loop area is supported, the: the indication information indicates that the allocation of the continuous resource unit/distributed resource unit is not performed in the resource mapping process. The resource mapping by the multiple base stations includes: when the multiple base stations perform the allocation of the continuous resource unit/distributed resource unit in the resource mapping process, all the microstrips in the frequency partition are used as the distributed resource unit, and the frequency is used. The subbands in the partition are all used as contiguous resource units.

The method according to claim 6, wherein the indication information specifically indicates whether allocation of consecutive resource units/distributed resource units is performed in all frequency partitions in the resource mapping process; In the resource mapping process, when performing allocation of consecutive resource units/distributed resource units, all the microstrips in all frequency partitions are used as distributed resource units, and all sub-bands in all frequency partitions are regarded as continuous resource units.

The method according to claim 6, wherein the indication information specifically indicates whether allocation of a continuous resource unit/distributed resource unit is performed in a predetermined frequency partition in the resource mapping process; In the resource mapping process, when performing the allocation of the continuous resource unit/distributed resource unit, all the start bands in the predetermined frequency partition are used as distributed resource units, and all the sub-bands in the predetermined frequency partition are regarded as continuous resources. unit.

The method according to claim 1, wherein the indication information indicates that the usage status of the open loop area is supported comprises: the indication information indicating that the multiple base stations use the same predetermined parameter to perform continuous resource unit/ The allocation of the distributed resource units; the resource mapping by the plurality of base stations includes: when the plurality of base stations perform the allocation of the continuous resource unit/distributed resource unit in the resource mapping process, the same predetermined parameter is used for continuous Resource unit/distribution resource unit allocation.

The method according to claim 9, wherein the indication information specifically indicates that the plurality of base stations use the same predetermined parameter to allocate the continuous resource unit/distributed resource unit in all frequency partitions; The plurality of base stations perform allocation of consecutive resource units/distributed resource units using the same predetermined parameters in all frequency partitions in the resource mapping process.

The method according to claim 9, wherein the indication information specifically indicates that the plurality of base stations perform allocation of consecutive resource units/distributed resource units by using the same predetermined parameter in a predetermined frequency partition; In the resource mapping process, the plurality of base stations perform the allocation of the continuous resource unit/distributed resource unit by using the same predetermined parameter in the predetermined frequency partition.

The method of any one of claims 9 to 11, wherein the predetermined parameter comprises: a substitution group and/or a replacement seed.

The method according to any one of claims 5 to 7, wherein, for the uplink resource mapping, the predetermined parameter comprises any one or combination of the following: a replacement base, a replacement seed, and a first frequency allocated. The number of uplink contiguous resource units of the partition in subband SB is UCAS _SB . The number of uplink contiguous resource units in UBS _MB allocated to the first frequency partition in units of U-band _MB . And the number of uplink contiguous resource units per frequency partition except the first frequency partition. UCAS For downlink resource mapping, the predetermined parameters include at least one of: a permutation basis, a permutation seed, and a allocation to the first frequency partition. The number of consecutive contiguous resource units in _SB is DCAS _SB . , the number of downlink continuous resource units in MB allocated to the first frequency partition, DCAS _MBQ and each except the first frequency partition Number of downlink continuous resource units in the frequency partition DCAS^

The method according to any one of claims 1 to 11, wherein the base station is included in a system configuration message sent to the terminal or the superframe header is used to indicate use as an open loop area. Instruction signaling of the logical resource unit.

15. A base station, comprising:

a sending module, configured to send a super frame header to the terminal, where the super frame header carries indication information indicating that the usage status of the open loop area is supported;

And a mapping module, configured to perform resource mapping according to the indication information, so that there is an aligned logical resource unit between the base station and other base stations in the communication system.